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Applications

Three duties cover most of the volume we ship: clarification, dewatering and grade selection. Each block shows the order the chemicals go in, because the sequence matters as much as the product.

Municipal & Industrial Wastewater

The classic two-stage duty. A coagulant neutralises the charge on the colloids and starts a floc; a polymer grows that floc until it settles or floats. Get the pairing wrong and the clarifier looks like it is doing nothing.

PAC 28% / 30%Polymeric ferric sulfateAnionic polyacrylamideCationic polyacrylamide

Typical programme

PAC or PFSStep 1 · Charge neutralisationFast mix, 1–3 min

Anionic / cationic PAMStep 2 · Floc growthSlow mix, 10–15 min

Clarifier / DAFStep 3 · Settling, flotation or filtrationSludge to dewatering

Doses and mixing times are confirmed against a jar test on your own water or sludge.

Sludge Dewatering

Dewatering is decided by the polymer, not the press. The right cationic grade releases free water quickly, keeps the cake firm and stops the belt blinding — which is what actually limits throughput.

Cationic polyacrylamide (10%–80% charge)PFS for conditioningLime where pH allows

Typical programme

Cationic PAMStep 1 · Floc the sludgeInline, 30–60 s

Belt / plate / screw pressStep 2 · Cake formationCake dryness varies by sludge

Return to head of worksStep 3 · Solids load checkProtects the plant load

Doses and mixing times are confirmed against a jar test on your own water or sludge.

Grade Selection & Jar Test

Two polymers with the same molecular weight can behave completely differently on your water. We select on a jar test rather than on a data sheet, and the sample is free so the test can happen on your bench.

Free sample of two or three shortlisted gradesDosing guidanceTDS and MSDS with the sample

Typical programme

SampleStep 1 · Raw water or sludgeOne litre is enough

DoseStep 2 · Coagulant first, then polymerFast then slow mix

ObserveStep 3 · Floc size, settling, clarityPick the lowest dose that works

Doses and mixing times are confirmed against a jar test on your own water or sludge.

By industry

Starting points only — the grade that wins is the one that works in the jar test, not the one that sounds right on paper.

Municipal sewageCoagulant → flocculantPAC 28% / 30% · Cationic PAM for sludge

Textile & dyeingCoagulant → flocculantPFS (decolourising) · Cationic PAM

Paper & boardCoagulant → flocculantWhite PAC / alum · Anionic or non-ionic PAM

Coal washingCoagulant → flocculantPAC · Anionic PAM, high MW

Sand & gravel washingCoagulant → flocculantPAC · Anionic PAM

Mining & tailingsCoagulant → flocculantPFS or PAC · Anionic / non-ionic PAM

ElectroplatingCoagulant → flocculantPAC / PFS · Cationic PAM

Food & slaughterhouseCoagulant → flocculantPAC · Cationic PAM

Aquaculture & pondsCoagulant → flocculantPAC 28% · Clarifier for small volumes

Nutrient removalCoagulant → flocculantSodium acetate / glucose

Send the water, not the adjectives.

A litre of sample, the pH and the suspended solids are enough for us to shortlist two or three grades and send free samples.

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